Electric hoist.



F. RATHER. ELECTRIC HOIST.

APPLICATION Hum 83M. 19, 1902.

i .110 110mm.

Fug. l v

mmss ss;

PATENTED JUNE 16, 1903.

2 BEBETB-BEBBT -1.

IIIVEN TUB SUB ITTUHNEY.

UNITED STATES Patented Tune 16, 1903.

FRANK NATI'IER, OF JOHNSTOWN, PENNSYLVANIA.

ELECTRIC HOlST.

SPECIFICATION formingpart of Letters Patent N 0. 730,955, dated June 16,1903.

Application filed September 19, 1902. Serial No. 124,108- (No model.)

To all whom, it may concern:

Be it known that I, FRANK NATHER, of Johnstown, in the county of Cambriaand State of Pennsylvania, have invented a new and useful Improvement inElectric Hoists, of which the following is a full, clear, and exactdescription, reference being bad to the accompanying drawings, whichform apart of this specification.

My invention has relation to an improved electric hoist, and is designedto provide a hoist of this character which is simple and compact inconstruction, capable of being easily and conveniently operated,and inwhich the hoist and motor are so constructed and arranged that in caseeither becomes broken a new motor or hoist may be readily substituted orin case of injury to the motor is so arranged that the hoist can bereadily operated by a chain in the usual manner.

With these objects in view 'my invention consists in the novelconstruction and combination of parts,all as hereinafter described, 7

erence being had to the accompanying drawings, in which- Figure 1 is anend view of a hoist embodying my invention; Fig. 2,afront view of thesame, and Fig. 3 a detail view.

In the drawings the letterA designates the frame of an electric motor,which may be of any well-known or approved construction, controlled by arheostat B and having its frame provided with a swiveled suspensionattachment 1), by means of which it may be connected to the usualoverhead trolley-carriage. (Not shown.)

Journaled in bearings c on the motor-frame is a transverse rock-shaft O,which carries a grooved wheel or pulley D and also a contact-arm E,which cooperates with fixed contacts 6 (see Fig. 3) of the rheostat B.This rheostat is of any usual or suitable construction, and as it formsno part of my invention, except as an element of the novel combinationsspecified in the appended claims, it is not shown and described indetail.

F is a brake-wheel, which is rigidly secured to one of the projectingend portions of the motor armature-shaft F, and G is a frictionbrake-block, carried by an arm G, which is pivoted at g below thearmature-shaft. The up er end portion of the arm G is pivotallyconnected to one end of an adjustable rod or link H, the other end ofwhich is formed with a loop or stirrup h, which engages an eccentricprojection h at one end of the rock-shaft O. A stiff spring I isalsoconnected to the said rod or link and to the motor-frame and acts tonormally hold the brake-block G in contact with the periphery of thewheel F.

J designates two cords or chains which are attached to and hang fromopposite sides of the pulley D, with suitable handles J at their lowerends.

K designates the hoist proper. In the form shown this consists of thewell-known tripleX block or hoist; but I may use any suitabledifferential hoist-block by removing the usual chain-wheel andsubstituting therefor the spur-wheel K, which is geared to thearmature-shaft of the motor by means of the reducing-gear K "This hoistis suspended from the lower side of the motor-frame by means of a blockL, having a T-shaped head L, which engages a slideway L in the lowerportion of the motorframe. To keep the hoist from swinging unduly, theblock L may have an arm Z, which is bolted to the frame of the hoist atZ.

' The rheostat B above referred to is of that type in which movement ofthe arm F. in one direction from the central contact 6, Fig. 3, connectsthe motor for rotation in one direction, while the reverse movement ofthe said arm connects the motor for reverse rotation. By pulling oneither one of the cords J the rock-shaft O is turned in its bearings,and by reason of the engagement of the eccentric projection h on thesaid shaft with the loop or stirrup h the brake-block G is moved out ofcontact with the brake-wheel F. At the same time the contact-arm E ismoved in one direction or the other to connect the m otor for rotationin the desired direction. To start the motor, therefore, all that isnecessary is to pull on one or the other of said cords, according to thedirection of rotation desired, and the motor will continue to rotate solong as this pull is maintained. As soon as the cord is released thespring I immediately acts to return the shaft 0 to its normal position,thus ICO cutting the motor out of circuit and applying the brakethereto.

The lugs 19 on the motor-frame, to which the suspension attachment 1) isconnected, are similar to the lugs Z on the hoist-frame to which theblock L is attached, and the spur gear-wheel K can be removed byremoving the nut 70. By these provisions in case of injury to orbreakage of the motor the latter can be disconnected from the hoist andfrom the overhead carriage, and the hoist can be connected to theattachment I). Then by substituting the usual chain-wheel for the spur-Wheel K the hoist can be operated by hand until the motor has beenrepaired or a new motor has been provided.

I do not wish to limit myself to the precise construction andarrangement of parts herein shown and described, as various changes maybe made in the details thereof without departing from the spirit andscope of my invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In an electric hoist, an electric motor havingaslideway in its bottomportion ,a hoist proper having a suspension-block detachably engagingsaid slideway, and thereby suspending the hoist from the motor, andreductiongearing between the hoist-shaft and the armature-shaft of themotor.

2. In an electric hoist, the combination with an electric motor havingits frame provided with suspension-lugs, and a hoist proper suspendedi'rom the frame of said motor and geared to the armature-shaft thereof,the suspension-lugs on the motor being constructed and arrangedsimilarly to those on the hoist whereby either the motor or the hoistmay be directly suspended from the same overhead carriage.

3. In an electric hoist, the combination with an electric motor, and ahoist proper suspended from the motor-frame and geared to themotor-armature, of a brake-wheel on the armature-shaft, a pivotedbrake-block for engagement with said wheel, a spring normallymaintaining such engagement, a rock-shaft journaled to the motor-frameand operatively connected with the brake-block, and means for manuallyoperating said rock-shaft.

4. In an electric hoist, the combination with a hoist proper, and anelectric motor for operating the same, of a brake-wheel on said motor, apivoted arm carrying a brake-block which engages said wheel, a springnormally maintaining such engagement, a rod or link connected to saidarm, a rock-shaft journaled to the motor-frame, and having an eccentricportion which engages a loop or stirrup of said rod or link," and meansfor manually operating said rock-shaft.

5. In an electric hoist, the combination with the hoist proper, anelectric motor for operating the same, and a rheostator switch forcontrolling said motor, of a rock-shaft to which the movable contactmember of the rheostat or switch is connected, means for manuallyturning said shaft in either direction, and a brake for said motoroperatively connected to said rock-shaft and released by the samemovement thereof which actuates said contact member.

In testimony whereof I have aflixed my signature in presence of twowitnesses.

' FRANK NA'IHER.

\Vitnesses:

LORETTO OCoNNELL, H. W. SMITH.

